Final answer:
A thesaurus is the best resource for finding a suitable replacement for the word 'ponder'.
Step-by-step explanation:
In order to find a suitable replacement for the word 'ponder', the resource that you would consult first is a thesaurus. A thesaurus provides synonyms or similar words for a given word, allowing you to choose a replacement that best fits the context of your sentence or writing.
Learn more about finding a suitable replacement for a word